Thermo-mechanical walking of straight and continuous-snake-laid pipelines on sloping seabeds

Seyfipour, I.; Walker, Alastair

doi:10.1016/j.apor.2019.101980

Cited by 7 publications

(1 citation statement)

References 5 publications

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“…The responses of a sloping seabed to seismic or seawater wave loads are different from the responses of horizontal seabeds and need to be specifically studied. This issue has attracted increased interest in recent years in various applications, including studies on slope stability (Feng and Price 14 ; Dou et al 15 ), pipelines (Xu et al 16 ; Seyfipour and Walker 17 ; and Rafiei et al 18 ), breakwaters (Zhao and Jeng 19 ; Ni and Teng 20 ), and small marine structures (Rafiei et al 21 ). All of these studies focused on the seawater wave-induced responses of seabeds and structures.…”

Section: Introductionmentioning

confidence: 99%

An analytical solution for the dynamic response of a seawater‐sloping seabed‐bedrock system under an oblique incident P wave

Shan

Xie

Dong

et al. 2023

Num Anal Meth Geomechanics

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Many offshore marine structures are built on seabeds with slight or considerable slopes, while most analytical studies have focused on the dynamic responses of horizontal seabeds. Based on the theory of porous media, an analytical solution for the response of a sloping seabed to earthquakes is developed in this paper. Stress and displacement responses can be shown at any location of the seabed.Using numerical examples, we analyze the influence of the slope angle, frequency and angle of incident waves, and thicknesses of the seawater and sediment layers on the dynamic response of the seabed. The results show that the solid displacement amplification factor of the surface of the horizontal seabed is always constant, while that of the sloping seabed changes periodically along the seabed surface. Even at a small site, the difference between a horizontal seabed and a sloping seabed is still significant. The slope angle has different effects on the seabed at different depths, and the inclination plays an amplification role at some depths and a reduction role at other depths. With an increase in slope angle, the difference between a horizontal seabed and a sloping seabed becomes more significant. Especially at natural frequencies, the amplification factor becomes more significant with increasing slope angle. Therefore, even though the same seawater depth is used in the model, a horizontal seabed model cannot be used to analyze the dynamic response of a sloping seabed or significant errors will occur.

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Section: Introductionmentioning

confidence: 99%

An analytical solution for the dynamic response of a seawater‐sloping seabed‐bedrock system under an oblique incident P wave

Shan

Xie

Dong

et al. 2023

Num Anal Meth Geomechanics

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An analytical solution for the dynamic response of a seawater‐sloping seabed‐bedrock system under an oblique incident SV wave

Shan,

Xie,

et al. 2023

Num Anal Meth Geomechanics

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The characteristics of seabed ground motion are the theoretical basis for the study of seawater‐soil‐structure interactions and seismic‐induced geological hazards. There are numerous offshore marine structures located on sloping seabeds. Therefore, the sloping seabed's seismic response requires to be investigated. Engineers and scholars are more interested in the SV waves because they carry more energy than the P waves in earthquakes. An analytical solution for the steady‐state response of the inclined seafloor under an oblique incident SV wave is offered. The impacts of the seafloor angle on the fluid pressure and displacement of the saturated sediment layer are investigated under different incident wave frequencies, incident angles, and thicknesses of the seawater layer and sediment layer. By observing along the seabed surface, we discovered that the slope angle might cause considerable variances between different positions even at a small site. While examining the seabed at varying depths, we discovered that the incline angle has distinct impacts on different areas of the seabed. It has an amplifying effect at some depths and a reducing effect at other depths. Generally, as the slope angle increases, the distinction between the responses of the inclined and horizontal seabed becomes more prominent. Especially when the incidence angle of the SV waves is near the critical angle, the impacts of the slope angle become more significant. Even if the horizontal seabed model is employed with the same seawater depth, it is not suitable for analyzing the seismic response of a sloping seabed. Otherwise, significant errors would arise.

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Analytical Solution for the Transient Response of A Sloping Seabed Induced by A P-Wave Line Source

Ma,

Shan,

Xie

et al. 2023

China Ocean Eng

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Thermo-mechanical walking of straight and continuous-snake-laid pipelines on sloping seabeds

Cited by 7 publications

References 5 publications

An analytical solution for the dynamic response of a seawater‐sloping seabed‐bedrock system under an oblique incident P wave

An analytical solution for the dynamic response of a seawater‐sloping seabed‐bedrock system under an oblique incident P wave

An analytical solution for the dynamic response of a seawater‐sloping seabed‐bedrock system under an oblique incident SV wave

Analytical Solution for the Transient Response of A Sloping Seabed Induced by A P-Wave Line Source

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